M52B28 Power output

Post Mon Jul 13, 2015 10:32 am

Just wondering what sort of power everyone else is getting from their M52B28's?

Post Mon Jul 13, 2015 11:10 am

Not a clue

Post Mon Jul 13, 2015 11:36 am

Haha, Never had it on a rolling road?

Post Mon Jul 13, 2015 11:56 am

215 to 225bhp seems about the average

with re-map, M50 inlet and free flow zaust.

Post Mon Jul 13, 2015 11:59 am

Ahh that's brilliant. Just making sure mine is in the normal region.

Post Mon Jul 13, 2015 12:58 pm

yung-gun wrote:Haha, Never had it on a rolling road?

All I have to go on is that the speedo will see 3 figures on the straightest bit of Blyton Park. Which ain't very long, given that it's a 1.6 mile circuit with 9 'official' corners

Post Mon Jul 13, 2015 1:02 pm

They are crazy engines for what they are.

Had mine on the roller on Friday, exhaust is blowing slightly and it has a small fuel leak

20c ambient temperature in the workshop and it pulled 222.2 at the wheel.

I'm in love with the way it drives, what gearbox are you using?

Post Mon Jul 13, 2015 1:05 pm

222 is very good, nice result.

Post Mon Jul 13, 2015 1:08 pm

Thank you! But i can't help but think with some proper fine tuning and sorting of my small issues and colder day it would increase my figure, i know not by much, but i am really intrigued

Post Mon Jul 13, 2015 1:09 pm

ZF 5-speed from the 328i donor car through a 3.15 Z3M LSD. Not been re-mapped, but using a lightened M20 flywheel/clutch, M50 inlet, standard 325i manifold-back system. No interior, carpets or sound deadening though.

Post Mon Jul 13, 2015 1:10 pm

Nice! Mines been mapped, but it was generic and not done on a road. How does it fair on economy with the 328 box?

Post Mon Jul 13, 2015 1:29 pm

Mine is similar spec but with M3 EVO 6 speed manual box, 3.46 diff, BTB exhaust system.

Post Mon Jul 13, 2015 1:54 pm

yung-gun wrote:Nice! Mines been mapped, but it was generic and not done on a road. How does it fair on economy with the 328 box?

It's a bit revvy on the motorway tbh, about 3000rpm at 70mph. But I reckon I get high 20's-low 30's on a steady run (60-70mph). Save fuel for the track!

Track work is deffo single figures. About 9mpg last time out by my rough estimation.

Hopefully going to borrow a re-mapped ECU next time out

Post Mon Jul 13, 2015 1:58 pm

Nice! I don't really know what mine is like, in need of a 6 pot coding plug to get a true figure on the revs